Roll-polisher



W. G. CRAWFORD.

Patented Feb. 22, 1921.

WILLIAM G. CRAWFORD, OF TARENTUM, PENNSYLVANIA..

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Specification of Letters Patent.

Application filed January 28, 1920. Serial No. 354,720.

To all whom it may concern:

Be it known that I, VVILLIAM G. CRAW- ronn, residing at Tarentum, in the county of'Allegheny and State of Pennsylvania, a citizen of the United States, have invented. or discovered certain new and useful Improvements in Roll-Polishers, of which improvements the following is a specificatiton.

It is the object of the invention to provide a roll polisher which may be portable, and which can be conveniently and effectively operated by a single workman whenever desired, without stopping or materially inter fering with the operation of the rolls.

In the accompanying drawings, Figure 1 is a vertical sectional elevation taken through the rolls of an ordinary sheet mill showing the preferred embodiment of the invention, with the polisher A in full lines applied to the upper roll of the mill and the polisher B in dotted lines applied to the lower roll. Fig. 2 is a top plan view of the polisher A of Fig. 1. Fig. 3 is a bottom plan view of the same. Fig. 4 is a sectional view of the polishing-stone of Fig. 1 on the line IVIV of Fig. 5; and Fig. 5 is a section on the line VV, Fig. 4. Fig. 6 is a side elevation of the polishing-stone. Fig. 7 illustrates a modification.

Referring first to Figs. 1-6, the polish ing-stone 1, to be presently described, is pivotedly secured to the face of the bar 2, by a central stud or pivot-bolt 3. The bar 2 may be made of any suitable material, but for economy and lightness a wooden plank is preferred. The face 4 of the stone is of concave form to approximate the are of the curvature of the rolls, and the body of the stone is preferably made up of a number of oblong individual blocks 5 of emery or other abrasive substance, each backed by a metallic strip 6, and held in place side by side so as to be capable of slight independent movement against the yielding pressure of springs 7 interposed between the rear face of each block and the base of the cap or casing 8. The sides of the individual blocks on their long dimension are straight, as will be the side wall 9 of the cap 8. On the other dimension the end walls of the blocks taper slightly inwardly and the end walls 10 of the cap 8 are correspondingly inwardly inclined. These inclined end walls 10 of the cap are yieldingly held in position to bind against the ends of the individual. blocks by means of opposite tie-rods 11 passing through ears 13 on the edges of the cap and provided at one end with a fixed collar 14, and at the opposite threaded end with a nut 15, there being arranged around the rod between the nut 15 and the adjacent ear 13 a cushioning spring 16. The pivot pin 3 passes through the base 17 of the cap Sand the body'of the bar 2. It will of course be understood that a unitary stoneof abrasive material may be used instead of a sectional. stone, and in some casesthe yielding backing may also be omitted.

Suitably mounted on the face of the bar 2 opposite the polishing stone is a standard 18 having an abutment 19 of suitable form to effectively fulcrum the bar 2 upon a fixed portion of the roll-housing, as for instance one of the usual tie-rods 20, as shown in Fig. 1. This standard 18 also carries a pair of oppositely projecting arms 21, one of which when the opposite free end or handle 22 of the bar 2 is moved to one side by the workman, will contact with the tierod 20, and will thus counteract any tendency of the stone 1 to move in the arc of a circle and ride up on the face of the roll, thus in-, suring the movement of the stone 1, by reason of its pivotal connection to the bar 2, in a pine horizontal line along the face of the ro 23, Fig. 1, is a guide of light sheet metal secured to the lower face of the polisher A to cause it to ride easily over the top roll when the end of the bar 2 is laid upon the roll. There is also attached to the polishing-stone 1 a curved arm 24 which will bear loosely against the face of the roll.

The free end 22 of the bar 2 is extended sufficiently to enable the workman, using it as a handle, to effectively manipulate the polisher manually. For instance, in using the polisher A to clean and polish the upper roll, it operates as a lever of the second order, and the workman may sit on the outer end of the bar 2, and oscillate the polishingstone 1 across the face of the roll as desired by pressing upon the floor with his feet.

The polisher B, for cleaning and polishing the lower roll, is operated as a lever of the first order, the abutment 19 being so formed and located as to fulcrum the bar 2 against one of the lower tie-rods 2O on the side of the mill facing the workman.

In the modification shown in Fig. 7 ,1 the Patented Feb. 22, 1921. I

polishing-stone 1", (either sectional or integral) has a fiat bearing-surface, and is secured in fixed relation to the bar 2 by means of a supplemental bolt or bolts 25, the construction and operation being otherwise the same.

Other modifications may be made by those skilled in the art Without departure from the substance of the invention as hereinafter claimed.

I claim as my invention:

1. A roll polisher consisting of a bar adapted to be fulcrumed upon a fixed member of a roll-housing, and having a polishing-stone pivotedly mounted thereon in position to bear against the surface of a roll, whereby horizontal oscillation of the free end of the bar will cause the polishing-stone to move across the surface of the roll in substantially a straight line.

2. A portable roll-Polisher consisting of a bar provided with an abutment adapted to be fulcrumed upon a fixed member of a roll-housing and having a projecting handle, and a polishing-stone pivotedly mounted upon said bar in position to be brought into operative contact with the surface of :1.

roll, whereby horizontal oscillation of the handle will cause the polishing-stone to move across the surface of the roll in substantially a straight line.

3. The combination with a pair of roll housings having a stand of rolls mounted therein and provided with a fixed bar connecting said housings, of a single portable bar adapted to be projected endwise into operative relation with the rolls and carrying a polishing block, and an abutment mounted on said bar adjacent to its inner end and adapted to be fulcrumed upon said fixed bar and having oppositely projecting horizontal arms adapted to contact with said fixed bar upon horizontal oscillation of the outer end of said portable bar, whereby said polishing stone is caused to move across the surface of the roll in substantially a straight line. o

In testimony whereof I have hereunto set my hand.

WILLIAM G. CRAWFORD.

Witnesses: BAYARD H. CHmsTY, FRANCIS J. TOMASSON. 

